Angela Liu

Author's posts

Hurricane Lane and Tree Safety

CAUTION:  Damaged trees and branches extremely hazardous  During hurricanes and other storm events, damaged trees and branches can become entangled in highly unstable positions. This can be true whether they are fallen or still standing. If you cut or try to move trees or branches, they can shift, fall, snap or “jump” toward you unexpectedly, …

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Western Chapter ISA Hawaii Conference Brings Out the Professionals

                    From August 14th to 18th, 2018, Western Chapter International Society of Arboriculture partnered with organizations on the four major Hawaiian islands to bring 2017 ANSI updates to our region’s arboriculture professionals. Gordon Mann, WCISA past president and current board member of the International Society of …

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Pest of the Month – March 2018

Wasmannia auropunctata Little Fire Ant Update Maui Invasive Species Committee produced a very effective youtube video: https://www.youtube.com/watch?v=mJ8TQ_ASsYQ Find out about ant management training on Hawai’i Island, the last Friday of every month, at www.littlefireants.com/AMC.html.                Distribution: Big Island – widespread; Oahu, Maui and Kauai – localized detections are being managed by …

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Pest of the Month – February 2018

New exotic ornate pit scale species found in Hawaii Island Asterococcus Prob. yunnanensis   Mahalo to the Hawaii Dept of Agriculture Plant Pest Control Branch, and Janis Matsunaga for the information and photos in this post. For more details, see: “Asterococcus sp. prob. yunnanensis Borchsenius (Hemiptera: Cerococcidae): A New Exotic Scale Insect Pest in Hawaii and the …

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AAA Tree Jamboree 2018 in Maui – Treetops!

Maui Green and Beautiful and Aloha Arborist Association: “Thanks!” To everyone who came to enjoy the day together, to our competitors for your inspiration and dedication to the profession, to our partners and volunteers for helping everyone have a great time, and especially to our sponsors CMI • TreeStuff • TrueWerk • WesSpur  ArborMaster • …

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Tree Climbing Workshop in Hilo, Hawaii – February 9, 2018

MAHALO NUI LOA   to STIHL and  for sponsoring this workshop and helping to promote best practices in Hawaii and to Mark Chisholm, Dan Kraus, and Tree Works, Inc. for helping to bring excellent programs to the tree industry in Hawaii    

Pest of the Month – November 2017

CANKERS Excerpted in part from Hawai‘i Landscape Plant Pest Guide: Plant Diseases, by Dr. Scot Nelson, University of Hawaii College of Tropical Agriculture and Human Resources (UH-CTAHR) PD-105, January 2015, available at: https://www.ctahr.hawaii.edu/oc/freepubs/pdf/PD-105.pdf Photos: Dr. Scot Nelson Description: Cankers are sunken areas of dead tissue or splits in the bark or epidermis of branches, stems, …

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Pest of the Month – October 2017

SNAILS and SLUGS Photos: Angela Liu  Arborists are concerned about land mollusks – snails, slugs, and semi-slugs – because ornamental woody plants provide hiding places for these pests. Tree seedlings, young leaves and tree fruit also provide forage for these gastropods. Exotic snail species are introduced when plant materials (landscaping supplies, Christmas trees, etc.) are …

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Pest of the Month – September 2017

AMBROSIA BEETLES (Weevil Family Curculionidae, SubFamily Scolytinae)   Photos (Except as noted): J.A. Zarders, A.H.Hara, R.Y. Niino‐DuPonte, S.K.Cabral, and K.L.Aoki. Ambrosia Beetles (2013). University of Hawai’I at Mānoa, CTAHR, Komohana Research & Extension Center, Hilo, HI.  Ambrosia beetles are small reddish-brown to dark-brown cylindrical beetles that tunnel into xylem tissue (sapwood or heartwood) and inoculate …

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Pest of the Month – August 2017

Pest of the Month – Bot canker, aka Ficus branch dieback (Botryosphaeria complex) * This pest is not currently in Hawai’i. AAA raises awareness of potential pest threats so that arboriculture professionals and residents alike can help our state monitor and identify pest problems when they arise.   Photos: University of California, Division of Agriculture & Natural Resources …

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